Herb Profile: Cat's Claw

Cat's Claw (Uncaria tomentosa)

Cat's Claw is found on trees in the rain forests of the Andes mountains, particularly in Peru. It earns its name from the sharp thorns on its stem. Cat's Claw appears to give the immune system a boost, accounting for its popularity in the treatment of AIDS, cancer, viral diseases, and other infections. At this point, however, there's little hard evidence that it has a major impact.

This herb also exhibits anti-inflammatory properties, making it a candidate for treatment of arthritis, gastritis, ulcers, and inflammatory bowel disorders. Again, however, there's no clinical research verifying its actual value.

In its native South America, Cat's Claw is a popular folk medicine for intestinal complaints, ulcers, arthritis, and wounds, and has been used (in large doses) as a contraceptive. Elsewhere, it has also been used for ailments ranging from asthma and diabetes to menstrual disorders, premenstrual syndrome, depression, acne, and hemorrhoids.

A Remedy For: Infections

Cat's Claw lowers blood pressure and studies have shown some anticancer effects.

Long term use can produce a dramatic drop in the body's levels of estrogen and progesterone. In one study, it was found to prevent estrogen from binding to the estrogen receptors on breast cancer cells.

Avoid If: Cat's Claw may cause the immune system to reject foreign cells, anyone with organ or tissue transplants should avoid it, as should those with autoimmune illnesses, multiple sclerosis, or tuberculosis. Cat's Claw should also be avoided during pregnancy, and is not for children under 2 years of age.

Special Cautions: Children over 2 and adults over 65 should begin with mild doses and increase the strength gradually if needed. Use by children for more than 7 to 10 days should be done only under the supervision of a doctor. The only potential side effect is diarrhea.Possible Drug InteractionsEuropean herbalists avoid combining Cat's Claw with hormonal drugs, insulin, and vaccines. When it's taken in conjunction with other herbs, the dosage may need reduction.

Special Information: If You Are Pregnant or BreastfeedingBecause of its potential effect on hormone levels, avoid Cat's Claw during pregnancy, and use it with caution, if at all, while breastfeeding.

How To Prepare: Cat's Claw is available in capsule, powder, and liquid form. To prepare a Cat's Claw liquid, simmer 30 grams of powder in approximately 3 cups of water for about 45 minutes, or until the liquid is reduced by one third. Allow to cool, then strain and refrigerate.

Dosage: Dosages of commercial preparations range from 250 to 1000 milligrams daily. Since potency may vary, follow the manufacturer's directions whenever available. When using the homemade liquid, take 2 ounces once daily on an empty stomach in the morning.



Overdosage: There is no information available.

Resources: PDR for Herbal Medicines, Encyclopedia of Herbs and Their Uses.


***Disclaimer: Information is intended for reference purposes only. No medical advice is intended or given. Always consult your family Physician or a qualified Holistic Health Practitioner before using any herbs or herbal therapies. Information about herbal therapies and other dietary supplements is regulated or evaluated by the Food and Drug Administration and therefore information should not be used to diagnose, treat, cure or prevent any disease.